First, yes I have searched and spent hours reading here and elsewhere on the topic. I'm just looking for a short confirmation one way or the other. Please see the attached pictures, this is the hood on my 59 Chevy and it seams like it would be practice panel before priming the rest of the car I'm assuming this is the type of remaining rust that many recommend treating with Phosphoric acid? i have some ready to go and just want to make sure. thanks
Looks Good....however, how do you neutralize the acid? Water??? Can you flap disc the rust off? Then yellow epoxy primer?
according to what i have read, you wash it off. i have used a lot of abrasives to get it to this point. i may try a flap disk just to see if it helps. since the primer is a two part epoxy it may be okay to paint over as is.
If you do use the acid the neutralizating with water needs to happen while the acid is still wet, not after it dries. If it does dry re apply the acid to reactivate and then wash it off.
Phosphoric acid?!? Why not use conventional metal prep. You can treat the rust without the need for water to neutralize. Putting water on bare medal as a final stage before painting can lead to a rust haze which is the last thing you want between the metal and your primer.
Im going to guess this thread will ne exactly like the others you have read that make your eyes bleed. That ospho is great at rust! Like magic I tell you. But a lot of primers don't like it. I have pictures to prove it.
I use Zep Rust Remover Dip...except now the Cali EPA Nazis have banned its sale here. Good thing I bought extra at HD last year.
Since I am fairly sure I will replace the hood before the whole car gets a finish paint job I may do it 1/2 and 1/2 and keep track of how it fairs. later i can post updates of the with and with out the treatment, sort of taking one for the team. thanks for the suggestions and comments